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http://jira.codehaus.org/browse/MNG-4996?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=253613#action_253613
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Frank Meilinger commented on MNG-4996:
--------------------------------------
The same problem occur with maven 3.0.2 when building massive parallel. In my
situation (> 200 modules) the problem occur within the compiler plugin for test
classes. Sometimes the junit 4.8 classes can't be found and sometimes the
mockito classes can't be found. I've never seen this error in non test classes
compile. So maybe it has something to do with the surefire plugin, but I don't
know.
When I run the build in serial or with only two parallel Threads (-T 2) it
works always but if I increase the parallel threads, I always get this test
class compilation errors. The errors does not occur always on the same module.
Sometimes a module will build well and a later module will fail and on an other
build the module fails which was successfully run on a previously build. But
with more than -T 2 I never had a successfully complete build over the whole
project.
Maybe this helps a bit for further analyzing.
> Maven3 parallel build fails occasionally for classpath problems.
> ----------------------------------------------------------------
>
> Key: MNG-4996
> URL: http://jira.codehaus.org/browse/MNG-4996
> Project: Maven 2 & 3
> Issue Type: Bug
> Components: Plugins and Lifecycle
> Affects Versions: 3.0.1
> Environment: maven 3.0.1, maven 3.0
> Reporter: Kari J. Niemi
>
> In a multimodule (>120 modules) maven build, the compiler plug-in would seem
> to fail in creating a correct class-path every now and then.
> Instead of this entry in maven -X logs for a single module build:
> ----
> [DEBUG] Configuring mojo
> 'org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile' with basic
> configurator -->
> ..
> [DEBUG] (f) classpathElements =
> [/home/karniemi/"mymodulepath"/target/classes,
> /home/karniemi/.m2/repository/org/apache/servicemix/servicemix-utils/1.2.0/servicemix-utils-1.2.0.jar,
>
> /home/karniemi/.m2/repository/org/apache/geronimo/specs/geronimo-stax-api_1.0_spec/1.0.1/geronimo-stax-api_1.0_spec-1.0.1.jar,
>
> /home/karniemi/.m2/repository/org/codehaus/woodstox/wstx-asl/3.2.6/wstx-asl-3.2.6.jar,
>
> /home/karniemi/.m2/repository/org/apache/servicemix/specs/org.apache.servicemix.specs.jbi-api-1.0/1.4.0/org.apache.servicemix.specs.jbi-api-1.0-1.4.0.jar,
>
> /home/karniemi/.m2/repository/org/apache/geronimo/specs/geronimo-activation_1.1_spec/1.0.2/geronimo-activation_1.1_spec-1.0.2.jar,
> /home/karniemi/.m2/repository/log4j/log4j/1.2.14/log4j-1.2.14.jar]
> ----
> every now and then I get this in the parallel build:
> ----
> [DEBUG] Configuring mojo
> 'org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile' with basic
> configurator -->
> ...
> [DEBUG] (f) classpathElements =
> [/home/karniemi/"mymodulepath"/target/classes]
> ----
> And of course the compilation fails because none of the dependencies are
> added to the classpath. Sometimes it goes fine in the multi-module build, but
> every now and then it fails for this.
> In both maven runs I can see that the dependencies are resolved fine:
> ----------
> [DEBUG] "mymodule":jar:DYNAMIC-SNAPSHOT
> [DEBUG] junit:junit:jar:4.7:test
> [DEBUG] org.apache.servicemix:servicemix-utils:jar:1.2.0:provided
> [DEBUG]
> org.apache.geronimo.specs:geronimo-stax-api_1.0_spec:jar:1.0.1:provided
> [DEBUG] org.codehaus.woodstox:wstx-asl:jar:3.2.6:provided
> [DEBUG]
> org.apache.servicemix.specs:org.apache.servicemix.specs.jbi-api-1.0:jar:1.4.0:provided
> (scope managed from compile) (version managed from 1.1.0)
> [DEBUG]
> org.apache.geronimo.specs:geronimo-activation_1.1_spec:jar:1.0.2:provided
> [DEBUG] log4j:log4j:jar:1.2.14:provided
> -----------
>
> The pluginArtifactMap looks like this:
> --------------------
> [DEBUG] (s) pluginArtifactMap =
> {org.apache.maven.plugins:maven-surefire-plugin=org.apache.maven.plugins:maven-surefire-plugin:maven-plugin:2.6:,
>
> org.apache.maven.surefire:surefire-booter=org.apache.maven.surefire:surefire-booter:jar:2.6:compile,
>
> org.apache.maven.surefire:surefire-api=org.apache.maven.surefire:surefire-api:jar:2.6:compile,
>
> org.apache.maven.surefire:maven-surefire-common=org.apache.maven.surefire:maven-surefire-common:jar:2.6:compile,
>
> org.apache.maven.shared:maven-common-artifact-filters=org.apache.maven.shared:maven-common-artifact-filters:jar:1.2:compile,
>
> org.codehaus.plexus:plexus-utils=org.codehaus.plexus:plexus-utils:jar:2.0.5:compile,
> junit:junit=junit:junit:jar:3.8.1:compile,
> org.apache.maven.reporting:maven-reporting-api=org.apache.maven.reporting:maven-reporting-api:jar:2.0.9:compile}
> --------------------
> I'm really using jbi-maven-plugin for most of the modules, and that plugin
> binds the other plugins -also the compiler-plugin -to maven life-cycle phases.
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